What Is The Meaning Of 2 A And 55B On Fire Extinguishers

- Apr 17, 2019-

 What is the meaning of 21A and 55B on fire extinguishers?

     Alphabet indicates the type of fire extinguishing, is a qualitative identification of fire extinguishing capacity, A indicates solid fire, B indicates liquid fire; Numbers represent fire extinguishing levels and are a quantitative representation of fire extinguishing capacity.

     The numbers in front of the letters represent the number of bars used for testing and the volume of liquids, respectively.


     For example, the ABC dry powder fire extinguisher with 2KG labeled 1 A and 21B indicates that it has 1 A and 21B fire extinguishing capacity.